Shallow wind slab avalanche (6-8" thick @ 4'000, W aspect) that looked to be triggered by a small piece of cornice that fell on the slope below. Photos below. This is VERY steep radical terrain sitting under a cornice - and, the type of small avalanche that would have high consequences considering the terrain. Also, the type of extreme/complex terrain that will, by nature, harbor some type of small slab here and there in the mountains when there is snow on the slopes.
Other than the above shallow wind slab, we did not find any other sign of instability.